Vehicle seats

Abstract

To improve safety property of a vehicle seat at the time of collision in which the vehicle seat has a rotatable lever in a vertical direction arranged at a rear part of a seat back to operate a lock mechanism of the seat back which can be switchable between an upright attitude and a fallen attitude toward a seat front side.SOLUTION: A center seat back rotatably mounted on an automotive body comprises: a lock mechanism 10 which is engaged with a striker 27 fixed to the automotive body to lock the center seat back to be in an upright posture and incapable of turning; and a lever 8 which is rotatably arranged around a rotating shaft 8A extending in a horizontal direction and unlocks the lock mechanism 10 by turning of the lever. A weight 8b to cancel inertial force is arranged at a position apart from the rotating shaft 8A in a radial direction so as to suppress the lever 8 from being turned around the rotating shaft 8A by the inertial force applied to the lever 8, when the center seat back is locked in the upright posture and when an impact load is applied to the center seat back from a rear side.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat. [Background technology]

[0002] Conventionally, there are vehicle seats, for example automobile seats, in which the seat back, which is rotatably supported relative to the automobile body, can be switched between an upright position and a reclined position toward the front of the seat. The automobile seat described in Patent Document 1 is provided with a strap that unlocks a locking mechanism that locks the seat back in an upright position relative to the automobile body, allowing the seat back to be reclined forward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-183140 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned automobile seats, the locking mechanism is unlocked by pulling the strap upward. Therefore, even if luggage hits the locked seat back from behind in a frontal collision or the like, the inertial force does not apply a force that pulls the strap upward, and the locking mechanism is not released. On the other hand, if the locking mechanism is unlocked using a vertically pivotable lever located at the rear of the seat back, depending on the location of the lever, there is a risk that the lever will rotate due to inertial force when luggage hits the locked seat back from behind, releasing the locking mechanism.

[0005] In view of these problems, an object of the present invention is to improve safety in the event of a collision in a vehicle seat in which the locking mechanism of the seat back, which can be switched between an upright position and a reclined position toward the front of the seat, is operated by an up-and-down pivotable lever located at the rear of the seat back. [Means for solving the problem]

[0006] The first invention of the present invention is a vehicle seat having a seat back that is rotatably attached directly or indirectly to a vehicle body, the vehicle seat having a locking mechanism that engages with a striker that is disposed on the seat back and fixed directly or indirectly to the vehicle body to lock the seat back in an upright position so that it cannot rotate relative to the vehicle body, and a lever that is disposed rotatably about a rotation axis extending horizontally at the rear of the seat back and rotates to unlock the locking mechanism, wherein when an impact load is applied to the seat back from behind while the seat back is locked in the upright position, a weight member that cancels the inertial force applied to the lever is disposed at a position radially spaced from the rotation axis to prevent the lever from rotating about the rotation axis due to the inertial force applied to the lever.

[0007] According to the first aspect of the present invention, even if an impact load is applied from behind to a seat back equipped with a lever that unlocks by rotating the locking mechanism around a horizontally extending rotation axis while the seat back is locked in an upright position, the lever is unlikely to be rotated in the unlocking direction by the inertial force because a weight member that counteracts the inertial force is disposed on the lever, thereby improving the safety of the vehicle seat in the event of a collision.

[0008] A second aspect of the present invention is characterized in that, in the first aspect, the weight member is cylindrical and has a central axis parallel to the rotation axis.

[0009] According to the second aspect of the present invention, since the weight member has a simple cylindrical shape, it is possible to suppress an increase in costs by simply cutting the wire or the like to an appropriate length.

[0010] A third aspect of the present invention is characterized in that, in the second aspect, the weight member is attached to the lever by fitting.

[0011] According to the third aspect of the present invention, the weight member can be attached to the lever by fitting, so no additional parts or materials are required for attachment, further reducing the cost increase. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of a seat back of a rear seat for an automobile according to an embodiment of the present invention, as viewed obliquely from the front. [Figure 2] 2 is an enlarged view of part II in FIG. 1, with the back frame omitted. [Figure 3] FIG. 2 is a perspective view of the lever of the embodiment as viewed obliquely from behind. [Figure 4] FIG. 2 is a perspective view of the lever of the embodiment as viewed obliquely from the front. [Figure 5] FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4. [Figure 6] 3A and 3B are diagrams illustrating the structure of a lever and a locking mechanism in the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] 1 to 6 show one embodiment of the present invention. This embodiment is an example in which the present invention is applied to a center seat back 2 of a rear seat 1 for an automobile. In each figure, arrows indicate the directions when the rear seat 1 for an automobile is installed in the automobile. In the following description, descriptions regarding directions will be made based on these directions. The left-right direction corresponds to the seat width direction.

[0014] The automobile rear seat 1 of this embodiment is a 6:4 split type seat located at the rear of the automobile, and is a six-sided seat that can accommodate two passengers. The automobile rear seat 1 is equipped with a center seatback 2 that provides a backrest for the center seated passenger, side seatbacks 3 that provide backrests for the side seated passengers, and seat cushions 4 that provide seating areas for the center seated passenger and the side seated passengers. Since the seat cushion 4 has a known configuration, its description will be omitted, and only the center seatback 2 and the side seatback 3 will be described. Here, the automobile rear seat 1 and the center seatback 2 correspond to the "vehicle seat" and "seatback" in the claims, respectively.

[0015] As shown in Fig. 1, the center seat back 2 includes a back frame 5 forming the framework, a locking mechanism 10, a back pad 6 serving as a cushioning material, a back cover 7 serving as a covering material, a lever 8, and a lever cover 9. The back pad 6 is fitted over the back frame 5 to form the outer shape of the center seat back 2. The back cover 7 is fitted over the back pad 6. The lever cover 9 is made of resin and is attached to the back frame 5 in a state where it covers the rear surface of the upper end of the center seat back 2 from above the back cover 7.

[0016] The back frame 5 includes a rectangular main body 5a, whose longitudinal axis is generally vertical when viewed from the front with the center seatback 2 in an upright position. It also includes an upper bracket 5b attached to the front upper end of the main body 5a, and a lower bracket 5c attached to the front lower end of the main body 5a. Ribs 5a1 extending parallel to each other in the vertical direction are formed on both left and right ends of the main body 5a to enhance its rigidity. A locking mechanism 10 is attached to the right end of the upper bracket 5b, and a pair of rectangular cylindrical headrest brackets 5b1 supporting headrest supports are attached to the front side. The lower bracket 5c includes a flat base 5c1 that abuts and is fixed against the front lower end of the main body 5a. The lower bracket 5c includes a pair of vertical walls 5c2 that extend forward from both left and right ends of the base 5c1 in a direction perpendicular to the base 5c1. Each of the pair of vertical walls 5c2 has a shaft hole 5c3 through which a rotation shaft 5d extending in the horizontal direction is inserted. The back frame 5 is attached to a fixed frame 30 fixed to the floor F so as to rotate back and forth around a rotation axis 5d. This allows the center seat back 2 to take two positions: a reclined position in which the front side faces the upper surface of the seat cushion 4, and an upright position in which the front side faces the upper surface of the seat cushion 4. Note that the rotation axis 5d is indirectly supported by the floor F via the fixed frame 30, but this is not limiting and the rotation axis 5d may be attached directly to the floor F. Here, the floor F corresponds to the "vehicle body" in the claims.

[0017] As shown in Fig. 1, the side seat back 3 can be placed in a reclined position with its front side facing the upper surface of the seat cushion 4, independently of the center seat back 2, or in an upright position with its front side facing the upper surface of the seat cushion 4. The side seat back 3 includes a back frame 20 forming a skeleton, a back pad 21 as a cushioning material, and a back cover 22 as a covering material. The back pad 21 is attached to cover the back frame 20 and forms the outer shape of the side seat back 3. The back cover 22 is attached to cover the back pad 21.

[0018] The back frame 20 includes a pair of left and right side frames 23 extending generally vertically when the side seat back 3 is in an upright position, an upper pipe 24 connecting the upper ends of the side frames 23, and a center pipe 25 connecting the generally vertical centers of the side frames 23. Each side frame 23 has a plate-like portion 23a whose length in the front-to-rear direction decreases as it extends upward when viewed from the left and right, and flanges 23b extending toward the inside of the back frame 20 at the front and rear ends to enhance rigidity. The plate-like portion 23a at the lower end of each side frame 23 is attached to the fixed frame 30 via a reclining adjuster 26. This allows the tilt angle of the back frame 20 relative to the seat cushion 4 to be changed. A pair of left and right rectangular cylindrical headrest brackets 5b1 supporting headrest supports are attached to the front side of the upper pipe 24. A striker 27 is attached via a striker bracket 28 to the upper part of the plate-shaped portion 23a of the side frame 23 on the left side, i.e., the side of the center seatback 2. Specifically, as shown in FIG. 2, the striker 27 is formed by bending a metal round bar into a U-shape, and the open end is fixed to the striker bracket 28. The striker 27 has a front rod-shaped portion 27a and a rear rod-shaped portion 27b that extend parallel to each other in the left-right direction. With the side seatback 3 in an upright position, the locking mechanism 10 of the center seatback 2 is engaged with the front rod-shaped portion 27a of the striker 27, thereby connecting the center seatback 2 to the side seatback 3 in an upright position. In other words, the striker 27 is indirectly fixed to the floor F via the side seatback 3.

[0019] 2 and 6, the locking mechanism 10 has a box-shaped case 11 that is open to the left, a hook 12 attached to the case 11, a pole 13 attached to the case 11, a cam 14 attached to the case 11, and a release member 15 attached to the case 11. The case 11 is attached to the upper bracket 5b of the back frame 5, and has a generally U-shaped recess 11a that opens rearward and downward when the center seatback 2 is in the upright position. The recess 11a is capable of receiving the front rod-shaped portion 27a of the striker 27 when the center seatback 2 is in the upright position. A hook shaft 12a is arranged extending in the left-right direction below and in front of the recess 11a in the case 11, a pole shaft 13a is arranged extending in the left-right direction above and behind the recess 11a in the case 11, a cam shaft 14a is arranged extending in the left-right direction above and in front of the pole shaft 13a, and a release member shaft 15a is arranged extending in the left-right direction between the hook shaft 12a and the cam shaft 14a.

[0020] As shown in FIG. 6, the hook 12 is a plate-shaped member attached to the case 11 by a hook shaft 12a so as to be rotatable about the shaft. The hook 12 is biased to rotate clockwise around the hook shaft 12a in FIG. 6 by the action of a hook spring 12a1. When the hook 12 is in a locked state engaged with the front rod-shaped portion 27a of the striker 27, the hook 12 has a hook portion 12b that is generally U-shaped in side view and opens rearward and upward above the hook shaft 12a. The hook 12 has a protrusion 12c that extends radially from the hook shaft 12a in a counterclockwise direction around the hook portion 12b, centered on the hook shaft 12a, in FIG. 6. The protrusion 12c includes an inclined surface portion 12c1 that extends upward from the upper end of the opening side of the hook portion 12b, and an arc-shaped portion 12c2 that extends counterclockwise from the upper end of the inclined surface portion 12c1 around the hook shaft 12a, in FIG. 6. Furthermore, a convex portion 12c3 is formed on the right side surface (the surface facing the side seat back 3) of the protruding portion 12c, protruding rightward (toward the side seat back 3) at approximately the midpoint between the hook shaft 12a and the arc-shaped portion 12c2. The inclined surface portion 12c1 is formed so that, in a locked state in which the pole 13, described later, is engaged with the hook 12, the hook engaging portion 13b1 of the pole 13 faces the inclined surface portion 12c1 across a gap. The arc-shaped portion 12c2 is formed so that, in a locked state in which the pole 13 is engaged with the hook 12, a first hook abutment portion 13b2 on the lower end of the protrusion 13b of the pole 13 abuts the inclined surface portion 12c2. Furthermore, an upper portion of the convex portion 12c3 is formed so that, in a locked state in which the pole 13 is engaged with the hook 12, the cam surface portion 14b1 of the cam 14 abuts against the inclined surface portion 12c3, applying a pressing force that rotates the hook 12 counterclockwise in FIG. 6 around the hook shaft 12a.

[0021] As shown in FIG. 6, the pole 13 is a plate-shaped member attached to the case 11 by a pole shaft 13a so as to be rotatable about its axis. The pole 13 is biased to rotate counterclockwise around the pole shaft 13a in FIG. 6 by the action of a pole spring 13a1. The pole 13 has a protrusion 13b that protrudes radially from the pole shaft 13a. A hook engagement portion 13b1 is formed at a radially intermediate portion of the protrusion 13b, facing across a gap the inclined surface portion 12c1 of the hook 12 that is locked by engaging with the striker 27. The hook engagement portion 13b1 is shaped as a part of an arc centered on the pole shaft 13a. A first hook abutment portion 13b2 is formed at the lower end of the protrusion 13b, which abuts and slides against the arc-shaped portion 12c2 of the hook 12 that is locked by engaging with the striker 27. A cylindrical first protrusion 13b3 that protrudes rightward (toward the side seat back 3) is formed on the right side surface (surface facing the side seat back 3) of the tip of the protrusion 13b. When the pole 13 is in a locked state where it is engaged with the hook 12, the pole abutment portion 15b1 of the release member 15 abuts against the first protrusion 13b3 from below, causing the pole 13 to rotate clockwise in FIG. 6 around the pole shaft 13a, thereby releasing the engagement with the hook 12 and entering an unlocked state. A cylindrical second protrusion 13b4 that protrudes rightward is formed on the right side surface between the first protrusion 13b3 and the pole shaft 13a of the protrusion 13b. When the pole 13 is rotated clockwise around the pole shaft 13a in FIG. 6, the second protrusion 13b4 abuts against the pole abutment portion 14c1 of the cam 14 from below, causing the cam 14 to rotate clockwise around the cam shaft 14a in FIG. 6 and disengage from the hook 12 to enter an unlocked state. A second hook engagement portion 13b5 is provided extending from the lower end of the hook engagement portion 13b1 toward the pole shaft 13a. When the pole 13 rotates clockwise around the pole shaft 13a in FIG. 6 and the hook engagement portion 13b1 is no longer facing the inclined surface portion 12c1 of the hook 12, the second hook engagement portion 13b5 abuts against the arc-shaped portion 12c2 of the hook 12, preventing the pole 13 from rotating counterclockwise around the pole shaft 13a in FIG. 6.

[0022] As shown in FIG. 6, the cam 14 is a plate-shaped member attached to the case 11 by a cam shaft 14a so as to be rotatable about the shaft. Cam spring 14a1 biases the cam 14 to rotate counterclockwise around the cam shaft 14a in FIG. 6. The cam 14 has a first extension 14b and a second extension 14c extending radially from the cam shaft 14a. The tip of the first extension 14b is formed with a cam surface 14b1 whose distance from the cam shaft 14a gradually increases as the distance increases clockwise around the cam shaft 14a in FIG. 6. The tip of the second extension 14c is formed with a pole abutment 14c1 against which the second protrusion 13b4 abuts when the pole 13 rotates clockwise around the pole shaft 13a in FIG. 6. In a locked state in which the hook 12 is engaged with the front rod-shaped portion 27a of the striker 27, the cam surface portion 14b1 abuts against and presses against the convex portion 12c3 of the hook 12, causing the hook 12 to rotate counterclockwise in Figure 6 around the hook axis 12a, so that the hook portion 12b engages with the front rod-shaped portion 27a without any play.

[0023] As shown in FIG. 6, the release member 15 is a plate-shaped member attached to the case 11 by a release member shaft 15a so as to be rotatable about the shaft. A release member spring 15a1 biases the release member 15 to rotate counterclockwise around the release member shaft 15a in FIG. 6. The release member 15 has a first extension 15b extending radially from the release member shaft 15a and a second extension 15c extending radially from the release member shaft 15a in the opposite direction to the first extension 15b. The first extension 15b is formed with a pole abutment 15b1 that abuts against the first protrusion 13b3 of the pole 13, causing the pole 13 to rotate clockwise in FIG. 6, when the release member 15 is rotated clockwise around the release member shaft 15a. A connecting wire 8c, which connects the release member 15 to the lever 8, is attached to the tip of the second extension 15c so as to be rotatable vertically relative to the lever 8.

[0024] As shown in FIGS. 2 to 6, the lever 8 is made of a resin member and is attached to the lever cover 9 so as to be rotatable about a rotation axis 8A extending in the left-right direction. The lever 8 has a main body 8a that is a substantially rectangular, flat plate with its major axis extending left-right when viewed from the rear, and a metal, cylindrical weight 8b attached to the top of the main body 8a. The main body 8a is provided with a pair of cylindrical engagement portions 8a1 on the left and right ends, each of which has a central axis of the rotation axis 8A. The main body 8a is configured to rotate about the rotation axis 8A by fitting into a pair of engagement portions 9a on the lever cover 9. The engagement portion 9a has an irregular cylindrical shape with a portion cut out by two opposing surfaces that are equidistant from the central axis. The engagement portion 8a1 has a notch 8a2 with a width slightly larger than the length between the two surfaces, allowing the engagement portion 9a to be fitted perpendicularly to the rotation axis 8A. A recess 8a3 for fitting and securing the weight 8b is formed between the left and right engaged portions 8a1 at the top of the main body 8a. The recess 8a3 is cylindrical, with an inner diameter slightly larger than the outer diameter of the weight 8b and a weight shaft 9A extending laterally along its central axis. An opening 8a4 is provided at the top for inserting the weight 8b. A pair of left and right claws 8a5 are provided at the front edge of the opening 8a4. These claws deform when the weight 8b is inserted into the recess 8a3 and then return to their original shape after insertion, thereby preventing the weight 8b from falling out. As shown in Figure 6, when the lever 8 is attached to the lever cover 9, the weight shaft 9A is positioned above the pivot shaft 8A, and the vertical distance between the weight shaft 9A and the pivot shaft 8A is set to be approximately equal to the radius of the weight 8b. A connecting wire attachment portion 8a6 protruding forward is provided on the front right portion of the main body 8a. A wire locking recess 8a7 is formed at the front end of the connecting wire attachment portion 8a6, opening downward and supporting the rear end 8c1 of the connecting wire 8c so that it can rotate up and down. Similar to the front end 8c2, the rear end 8c1 of the connecting wire 8c is bent to the right and extends left and right. The front end 8c2 of the connecting wire 8c is attached to the tip of the second extending portion 15c of the releasing member 15 via a resin support member 15c1 so that it can rotate up and down.Here, the weight 8b corresponds to the "weight member" in the claims.

[0025] As shown in Figures 5 and 6, the state of the lever 8 indicated by the solid line is the normal state in which the locking mechanism 10 is locked. The state of the lever 8 indicated by the two-dot chain line is the state in which the lever 8 is pulled rearward and rotated about the rotation axis 8A to release the locking state of the locking mechanism 10. When the lever 8 is pulled rearward and rotated about the rotation axis 8A from the state in which the locking mechanism 10 is locked as shown in Figure 6, the connecting wire 8c is pulled rearward, causing the release member 15 to rotate clockwise in Figure 6 about the release member axis 15a. Then, the pole abutment portion 15b1 of the release member 15 pushes up the first protrusion 13b3 of the pole 13 from below, causing the pole 13 to rotate clockwise in Figure 6 about the pole axis 13a. Then, second protrusion 13b4 of pole 13 pushes up pole abutment portion 14c1 of cam 14, causing cam 14 to rotate clockwise in FIG. 6 around cam shaft 14a, and cam surface portion 14b1 disengages from protrusion 12c3 of hook 12. Then, hook 12 rotates clockwise in FIG. 6 around hook shaft 12a due to the rotational biasing force of hook spring 12a1, and hook portion 12b disengages from front rod-shaped portion 27a of striker 27, entering an unlocked state. In this state, even if the hand is released from lever 8, causing lever 8 to enter the state shown by the solid line, and release member 15 returns to the original locked state, second hook engagement portion 13b5 of pole 13 abuts arc-shaped portion 12c2 of hook 12, preventing counterclockwise rotation in FIG. 6, and locking mechanism 10 remains unlocked. In this state, the center seatback 2 can be rotated forward about the rotation axis 5d to assume a reclined position. When the center seatback 2 is then rotated rearward about the rotation axis 5d, the front rod-shaped portion 27a of the striker 27 comes into contact with and is pressed against the inclined surface portion 12c1 of the hook 12, causing the hook 12 to rotate counterclockwise about the hook axis 12a in Figure 6. Then, the hook portion 12b engages with the front rod-shaped portion 27a of the striker 27 to assume a locked state.At this time, second hook engaging portion 13b5 of pole 13 is released from contact with arc-shaped portion 12c2 of hook 12, causing pole 13 to rotate counterclockwise around pole shaft 13a in FIG. 6 due to the biasing force of pole spring 13a1, and the rotation is stopped when first hook contact portion 13b2 contacts arc-shaped portion 12c2 of hook 12. At this time, hook engaging portion 13b1 of pole 13 faces inclined surface portion 12c1 of hook 12 across a gap. Then, pole contact portion 14c1 of cam 14 is released from contact with second protrusion 13b4 of pole 13, causing cam 14 to rotate counterclockwise around cam shaft 14a in FIG. 6 due to the biasing force of cam spring 14a1. As a result, cam surface portion 14b1 of cam 14 abuts against and presses against protrusion 12c3 of hook 12, causing hook 12 to rotate counterclockwise around hook shaft 12a in Figure 6 so that hook portion 12b engages with front rod-shaped portion 27a without any play. In this way, locking mechanism 10 is configured to return to its original locked state.

[0026] The present embodiment configured as described above provides the following advantageous effects. When the lever 8 is in the locked state with the locking mechanism 10 shown by the solid line in FIG. 6 , luggage or the like may strike the center seatback 2 in an upright position from behind during a rear-end collision or other such event. Because the center of gravity of the main body 8a of the lever 8 is positioned downward from the pivot axis 8A, an inertial force acts to rotate the lever 8 counterclockwise around the pivot axis 8A (as shown in FIG. 6 ). When the lever 8 rotates counterclockwise around the pivot axis 8A, the locking mechanism 10 attempts to unlock. The cylindrical weight 8b is disposed on the lever 8 with its weight axis 9A positioned above the pivot axis 8A. This counteracts the inertial force applied to the lever 8, making it difficult for the lever 8 to be rotated in the unlock direction by the inertial force. This allows the center seatback 2 to maintain its upright position, thereby improving the safety of the automotive rear seat 1 during a collision.

[0027] Weight 8b is cylindrical, with its central axis, weight axis 9A, arranged parallel to pivot axis 8A. This allows weight 8b to have a simple shape and be made by simply cutting wire or the like to an appropriate length, thereby reducing costs. Furthermore, weight 8b is attached by fitting into recess 8a3 of lever 8, eliminating the need for additional parts or materials for attachment, further reducing costs.

[0028] Although specific embodiments have been described above, the present invention is not limited to those external appearances and configurations, and various modifications, additions, and deletions are possible within the scope of the present invention. For example, the following can be mentioned.

[0029] 1. In the above embodiment, the weight 8b is cylindrical, but is not limited to this. It may be a simple polygonal prism such as a square prism or a hexagonal prism.

[0030] 2. In the above embodiment, the weight 8b is configured to be attached by fitting into the recess 8a3 of the lever 8, but this is not limiting and it may be attached by mechanical means such as adhesive or screws.

[0031] 3. In the first embodiment, the present invention is applied to the rear seat 1 for an automobile, but is not limited to this and may be applied to seats installed in aircraft, ships, trains, etc. [Explanation of symbols]

[0032] 1. Rear car seats (vehicle seats) 2 Center seat back (seat back) 4 seat cushions 5 Back Frame 5d rotation axis 8 Lever 8a Main body 8a3 recess 8a4 opening 8a5 nails 8b weight 8c Connecting Wire 8A Rotating shaft 9 Lever cover 9A Weight shaft 10 Locking mechanism 27 Striker 27a Front bar 30 fixed frames F Floor (vehicle body)

Claims

1. A vehicle seat having a seat back rotatably attached directly or indirectly to a vehicle body, a locking mechanism that engages with a striker that is disposed on the seat back and directly or indirectly fixed to the vehicle body to lock the seat back in an upright position so as not to be able to rotate relative to the vehicle body; and a resin lever that is disposed at the rear of the seat back so as to be rotatable about a rotation axis that extends horizontally and that rotates to unlock the locking mechanism, When an impact load is applied to the seat back from behind while the seat back is locked in an upright position, a weight member that cancels the inertial force applied to the lever is disposed at a position radially spaced from the pivot shaft to prevent the lever from pivoting about the pivot shaft due to the inertial force applied to the lever, The weight member is attached to the lever by fitting.

2. 2. The vehicle seat according to claim 1, wherein the weight member is cylindrical and has a central axis parallel to the pivot shaft.

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